Comment by lumpypua

While we're talking about python caching libraries, I'd like to recommend https://github.com/codeinthehole/django-cacheback

"It's an extensible caching library that refreshes stale cache items asynchronously using a Celery or rq task. The key idea being that it's better to serve a stale item (and populate the cache asynchronously) than block the response process in order to populate the cache synchronously."